RapiseLauncher is a free component that installs with Rapise and lets you execute Rapise tests remotely from SpiraTest, it only can run Rapise tests

RemoteLauncher is a commercial tool that installs standalone that lets you execute automated tests using other tools from SpiraTest (i.e. not Rapise tests, but tests using Selenium, QTP, NeoLoad, TestComplete,Ranorex, etc.)